Hi, We are currenlty evaluating jbosscache and performing some initial tests to see if all required functionality reacts well. the problem I found is when you "clear" a Node. the behavior of put is not good. it still return an "old Object" instead of returning null as get is doing please see below the sample code to reproduce the problem TreeCache _treeCache = new TreeCache(); PropertyConfigurator config = new PropertyConfigurator(); config.configure( _treeCache,"./testfiles/jbosscache/treecache.xml" ); _treeCache.createService(); // kick start tree cache _treeCache.startService(); // kick start tree cache Object ret = _treeCache.put("a/b","key","testString"); //ret it null as expected ret = _treeCache.get("a/b","key"); // ret is not null as expected _treeCache.get("a/b").clear(); // we clear the cache ret = _treeCache.get("a/b","key"); //ret it null as expected // HERE IS THE PROB ret = _treeCache.put("a/b","key","anotherstring"); //ret is not null but equals to testString _treeCache.stopService(); View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3993886#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...